Leave Quimper via the D765 towards Douarnenez. After the winding climb, turn right at the sign for Coat Ligavan, marked as a dead end. Follow this road downhill and, at the three-way junction (rubbish bins), keep to the right. Park in a small space after a house, just before a barrier. A few spaces are also available near a house just nearby.
(S/E) With your back to the car park, walk down towards the barrier and continue along the stretch of road used during the viaduct’s construction. You’ll reach a retention basin.
(1) Go round it on the right and take a narrow path that passes under the north-western bypass between the last two piers. Follow this small path through the woodland as it descends alongside the Ruisseau de Kermabeuzen. Pass gas pipeline No. 114 and reach a rustic footbridge (with beautiful royal osmund ferns).
Cross the stream, begin a steady climb, still through the woodland, and arrive at a fork in the road.
(2) Turn right and continue uphill until you reach the junction with a small road. This entire section of the route does not appear on the IGN map but is clearly visible on OSM.
Turn right, follow this road lined with beautiful beech trees and pass an old wash house on your left. You’ll reach a crossroads (sign for Allée de Creac’h Ibil).
(3) Turn left onto a long lane, also lined with beautiful beech trees, and at the end (large rhododendron), turn left onto the road which ends at the imposing Manoir de Toulgoat (private). Turn right onto the path leading into the woods and reach a three-way junction.
Turn left and begin the descent towards the Kermabeuzen Stream. Note the old chestnut trees along the way.
(4) Turn left onto a path that leads deep into the woods. If you reach a footbridge, turn back as you have missed the start of the path. Follow the path through the woods, which first runs alongside a marshy area and then through meadows bordered by the Ruisseau de Kermabeuzen. Pass behind the Moulin Roux farm. The path climbs and overlooks the stream, which becomes barely visible.
(2) At the Fork in the road you passed on the way there, turn right and begin a descent to reach a footbridge over the stream.
Continue with the stream now on your left, passing post No. 144 marking a gas pipeline.
(5) Shortly afterwards, look out for a discreet path that climbs to the right and leads to a wider track at the right-of-way of gas pipeline No. 114. Turn left; you can already hear the rumble of the ring road before it comes into view at the end of the track. Pass under this beautiful viaduct and head down a stony path towards the retention basin. Go round it on the right.
(1) Turn right and head back up to return to the car park (S/E).

